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https://gitlab.com/libvirt/libvirt.git
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f2f9742d4d
The rule generating the HTML docs passing the --html flag to xsltproc. This makes it use the legacy HTML parser, which either ignores or tries to fix all sorts of broken XML tags. There's no reason why we should be writing broken XML in the first place, so removing --html and adding the XHTML doctype to all files forces us to create good XML. This adds the XHTML doc type and fixes many, many XML tag problems it exposes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
124 lines
4.1 KiB
XML
124 lines
4.1 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<body>
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<h1>OpenVZ container driver</h1>
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<ul id="toc"></ul>
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<p>
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The OpenVZ driver for libvirt allows use and management of container
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based virtualization on a Linux host OS. Prior to using the OpenVZ
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driver, the OpenVZ enabled kernel must be installed & booted, and the
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OpenVZ userspace tools installed. The libvirt driver has been tested
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with OpenVZ 3.0.22, but other 3.0.x versions should also work without
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undue trouble.
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</p>
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<h2><a name="project">Project Links</a></h2>
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<ul>
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<li>
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The <a href="http://openvz.org/">OpenVZ</a> Linux container
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system
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</li>
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</ul>
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<h2><a name="connections">Connections to OpenVZ driver</a></h2>
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<p>
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The libvirt OpenVZ driver is a single-instance privileged driver,
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with a driver name of 'openvz'. Some example connection URIs for
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the libvirt driver are:
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</p>
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<pre>
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openvz:///system (local access)
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openvz+unix:///system (local access)
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openvz://example.com/system (remote access, TLS/x509)
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openvz+tcp://example.com/system (remote access, SASl/Kerberos)
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openvz+ssh://root@example.com/system (remote access, SSH tunnelled)
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</pre>
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<h2><a name="notes">Notes on bridged networking</a></h2>
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<p>
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Bridged networking enables a guest domain (ie container) to have its
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network interface connected directly to the host's physical LAN. Before
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this can be used there are a couple of configuration pre-requisites for
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the host OS.
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</p>
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<h3><a name="host">Host network devices</a></h3>
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<p>
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One or more of the physical devices must be attached to a bridge. The
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process for this varies according to the operating system in use, so
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for up to date notes consult the <a href="http://wiki.libvirt.org">Wiki</a>
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or your operating system's networking documentation. The basic idea is
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that the host OS should end up with a bridge device "br0" containing a
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physical device "eth0", or a bonding device "bond0".
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</p>
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<h3><a name="tools">OpenVZ tools configuration</a></h3>
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<p>
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OpenVZ releases later than 3.0.23 ship with a standard network device
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setup script that is able to setup bridging, named
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<code>/usr/sbin/vznetaddbr</code>. For releases prior to 3.0.23, this
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script must be created manually by the host OS administrator. The
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simplest way is to just download the latest version of this script
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from a newer OpenVZ release, or upstream source repository. Then
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a generic configuration file <code>/etc/vz/vznet.conf</code>
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must be created containing
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</p>
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<pre>
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#!/bin/bash
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EXTERNAL_SCRIPT="/usr/sbin/vznetaddbr"
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</pre>
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<p>
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The host OS is now ready to allow bridging of guest containers, which
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will work whether the container is started with libvirt, or OpenVZ
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tools.
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</p>
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<h2><a name="example">Example guest domain XML configuration</a></h2>
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<p>
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The current libvirt OpenVZ driver has a restriction that the
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domain names must match the OpenVZ container VEID, which by
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convention start at 100, and are incremented from there. The
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choice of OS template to use inside the container is determined
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by the <code>filesystem</code> tag, and the template source name
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matches the templates known to OpenVZ tools.
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</p>
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<pre>
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<domain type='openvz' id='104'>
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<name>104</name>
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<uuid>86c12009-e591-a159-6e9f-91d18b85ef78</uuid>
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<vcpu>3</vcpu>
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<os>
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<type>exe</type>
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<init>/sbin/init</init>
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</os>
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<devices>
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<filesystem type='template'>
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<source name='fedora-9-i386-minimal'/>
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<target dir='/'/>
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</filesystem>
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<interface type='bridge'>
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<mac address='00:18:51:5b:ea:bf'/>
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<source bridge='br0'/>
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<target dev='veth101.0'/>
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</interface>
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</devices>
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</domain>
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</pre>
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</body>
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</html>
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